I'm not sure you can blame that on the broadhead. Any broadhead that hits high above the mid-line is liable to not leave a blood trail as it need more internal bleeding to fill up the chest cavity in order for it to begin spilling out. I had the same results from the "slit" left by the Rage on several occasions. I'll take a hole over a slit any day. As for the doe that didn't die, I'm not picking on you at all because Lord knows I've made my mistakes, but I wouldn't put that all on the broadhead either. That is a classic "dead zone" hit IMO. A little high/back, enough to cause some harm, but not enough to kill them. I made the exact same shot on a P&Y 8 my second bow season. I was for sure he was dead after I watched the Thunderhead 125 tipped Easton disappear in the "boiler room". Ended up being a high, single lung hit and he survived. There are no doubts in my mind if you deliver a Slick Trick, or any other broadhead, to the 10-ring, it will kill a deer. But they are tough animals and even some marginal hits will leave you scratching your head...
I'll also be shooting Slick Trick Magnums again this year. I love the "slug hole" they leave and you can't beat the flight!